: Set strict file size maximums to prevent Denial of Service (DoS) attacks via massive file uploads. AI responses may include mistakes. Learn more
| Traditional Approach | Vulnerability | Gunner Project Mitigation | |----------------------|---------------|----------------------------| | Trust Content-Type header | Attacker sends image/jpeg with PHP code | Re-validate using fileinfo or magic database | | Block .php but allow .php3 or .phtml | Extension blacklisting is incomplete | Whitelist ONLY safe extensions ( .jpg , .pdf , .txt ) | | Store in /uploads/ | Direct access leads to RCE | Store outside webroot with a secure download proxy | fileupload gunner project
MIT License
Examples : Prepending GIF89a; to a PHP script to mimic a GIF. : Set strict file size maximums to prevent
@app.post("/upload") async def upload_chunk(file: UploadFile, chunk_index: int, total_chunks: int, filename: str): temp_path = os.path.join(UPLOAD_DIR, f"filename.part") with open(temp_path, "ab") as buffer: content = await file.read() buffer.write(content) @app.post("/upload") async def upload_chunk(file: UploadFile